Some Experiences with Rules in Procedural Languages

We report on experiences on adding a rule based expression mechanism to an existing procedural programming language (C++) and on designing and implementing a selfcontained language -- and its integrated programming environment -- supporting similar but more general capabilities. Both languages, XC and XE, are based on abstract data types and XE is a close relative of CLU. Its programming environment -- implemented on a LISP workstation -- contains facilities for editing and composing programs, browsing a program data base, debugging, version management, and cross-compilation to various microprocessors, including the Intel 8086. Key words: Programming languages, Embedded systems, Expert systems 1. Background Embedded systems are claimed to be a promising industrial AI application. The ExBed project (expert system framework for embedded applications) was established to determine how expert system techniques can be applied within embedded systems running on a microcomputer. Fagan (1980)..